Malicious PDF — malware analysis report

Static analysis result for SHA-256 734fa7d85d099ca7…

MALICIOUS

PDF

60.5 KB Created: 2020-08-05 00:59:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a42ea98d53db77a8a40f6d79a294357 SHA-1: cf69f86d471cb58b3fc77c8bb2185063298ac3f3 SHA-256: 734fa7d85d099ca7637fff1f5341927ca44c73fc7634c18f9aab78c91c4c4105
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=bsc+1st+sem+books+pdf', is flagged as a malicious redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into paying fees for prizes or parcels, aligning with the observed link farm and redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bsc+1st+sem+books+pdf
    • http://vurovug.noelcustoms.shop/uploads/1/3/0/7/130738720/947f542f149235.pdf
    • http://files.quadifyrc.com/uploads/1/3/1/8/131871705/jevokibekexaxowereb.pdf
    • http://files.arogueidea.com/uploads/1/3/1/6/131637224/bujupazap.pdf
    • http://files.adkstrings.com/uploads/1/3/2/6/132681452/6cae49c564e4e82.pdf
    • http://jozuwoge.estherwayne.com/uploads/1/3/0/7/130775320/wokejunozumuruvupow.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/89965927340.pdf
    • https://cdn.shopify.com/s/files/1/0434/6216/4644/files/wefamarizabufaretewexi.pdf
    • https://cdn.shopify.com/s/files/1/0432/7312/6052/files/jatagikuderebolubezixe.pdf
    • https://cdn.shopify.com/s/files/1/0436/7928/5401/files/22730829011.pdf
    • https://cdn.shopify.com/s/files/1/0429/4151/3895/files/alanis_morissette_supposed_former_infatuation_junkie.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xakisone.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/how_to_remove_emoji_from_text_php.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/14262774438.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/multiple_inheritance_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0431/4152/9754/files/actuarial_valuation_report.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/engineering_chemistry_notes_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/0506/6913/files/dalinoxirobirubidufoxezi.pdf
    • https://cdn.shopify.com/s/files/1/0433/5121/2200/files/lisote.pdf
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/letatugotal.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007ff4.bin
44013cdcdb3cd59ff18ead6e6df27701d665e1157cb7e6cbad1a45af2d947e57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FF4 5268 bytes
font_01_sfnt_off000091d8.bin
55635b50bad29c6b04cd9b4d5dd064b78be6c29eafc981c666da6fe4470a6799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x91D8 3204 bytes
font_02_sfnt_off00009ec8.bin
6979bd47582e1076a00d5472c1190b3af330e4342ab9b9f0dc7d58f6ae02f5fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EC8 2576 bytes
font_03_sfnt_off0000a9bb.bin
dccb82e7be01f8b8b5f63972d43c7be8e2b337b0f92e6d67e7b11c2eafb97e88		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9BB 10764 bytes
font_04_sfnt_off0000ce78.bin
aead5909105c2c91be994e936b990d4ad0f64aef1ebd7ea7814b21a3d287ff12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE78 16260 bytes

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