Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ed07fd9531bfe5…

MALICIOUS

PDF

42.2 KB Created: 2020-08-19 23:32:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1dd930c76483f218a75629f59dce9455 SHA-1: f7d248387a4686ac8808cf256543cf851273f117 SHA-256: e0ed07fd9531bfe5df0c253d3dc6218f5d62cf692fd3e043bca09f29cfd7bcd2
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though partially corrupted, contains text referencing 'Adobe flash player free mac ipad', suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the redirector URL, which likely serves as a gateway to further malicious content.

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.cc/pify?keyword=adobe+flash+player+free++mac+ipad
    • http://rorejebip.rauserv.com/uploads/1/3/1/4/131437812/776663.pdf
    • http://files.pdxprays.com/uploads/1/3/1/3/131383018/wikixawasagi.pdf
    • http://xakovatuw.1songproductions.org/uploads/1/3/1/3/131378960/businafetexomedu.pdf
    • http://nurivos.outcomemedia.com.au/uploads/1/3/1/4/131454057/e8343abb3f70.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/drawstring_c_rotatetransform.pdf
    • https://cdn.shopify.com/s/files/1/0441/1123/3176/files/circulatory_system_diagram_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/optimus_prime_transformer_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/0618/8955/files/advanced_engineering_mathematics_10th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3659/files/bunting_border_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8080/files/terran_build_orders.pdf
    • https://cdn.shopify.com/s/files/1/0431/7764/0093/files/21390946668.pdf
    • https://cdn.shopify.com/s/files/1/0433/9659/5868/files/biology_12_ncert_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0441/3777/5256/files/89214846978.pdf
    • https://cdn.shopify.com/s/files/1/0429/3197/8403/files/ramumufurilalorun.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5266/files/65496773762.pdf
    • https://cdn.shopify.com/s/files/1/0438/0744/1053/files/biology_100_lab_manual_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/8476/7641/files/32907656032.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84770620138.pdf
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/23522999357.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006536.bin
d4cd131dbea6103da28cb6d1cbce39c1804c6b679fbea9ab354774efae6c7ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6536 5628 bytes
font_01_sfnt_off00007832.bin
8dfcd1446a272b9c0b51088467bbf038957ca27746169ea336971adb07872430		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 10400 bytes

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