Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c8a7d23166e36e2…

MALICIOUS

PDF

47.9 KB Created: 2020-08-11 07:26:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83e10b5d0714887611305c09126c13f2 SHA-1: c7f26a5285807d24b7f76d74bf6d66c342c36f35 SHA-256: 6c8a7d23166e36e2f65ef8629afa1c4ecbba131bf4fca5099deea6d019de5879
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including one identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=operasi+aritmatika+dan+logika+pemrograman+dasar+pdf, which is a known malicious redirector. The presence of many Shopify links suggests a link farm used to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=operasi+aritmatika+dan+logika+pemrograman+dasar+pdf
    • http://sagok.bukitbintang-residences.com/uploads/1/3/2/6/132682883/531495.pdf
    • http://files.tylertecture.com/uploads/1/3/0/7/130739544/dc2b4cf9305405.pdf
    • http://konesax.ironmenfootball.com/uploads/1/3/1/4/131406717/timezanafigud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/8857/6673/files/brother_dcp_l2540dw_driver.pdf
    • https://cdn.shopify.com/s/files/1/0429/9934/9407/files/pezerewomigifuzumiv.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/24980485904.pdf
    • https://cdn.shopify.com/s/files/1/0428/6224/8095/files/miwapufibawapebunopitenax.pdf
    • https://cdn.shopify.com/s/files/1/0434/8005/5958/files/casual_vacancy_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/rilagikikupusekawaxegu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8890/3325/files/20800003160.pdf
    • https://cdn.shopify.com/s/files/1/0433/0009/4112/files/cheat_engine_6._1.pdf
    • https://cdn.shopify.com/s/files/1/0432/2266/3325/files/galinomopaxonemalemepuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/1539/5738/files/avery_templates_18660.pdf
    • https://cdn.shopify.com/s/files/1/0437/8014/5313/files/46764201306.pdf
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/97109634985.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/2125107440.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006605.bin
b0e4ed8858534fef8ae0a6f092f3f9d7b53cf2e55bf6c18fd377999b3524d71e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 5240 bytes
font_01_sfnt_off000077b9.bin
90710ab9ea2b85cc2a9a22d367d753c12a4650966beec0722a2ee03fac150a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B9 13992 bytes
font_02_sfnt_off0000a3c5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA3C5 4324 bytes

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