Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc982254e0231cfa…

MALICIOUS

PDF

34.3 KB Created: 2020-08-28 05:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07b5d78db33cef4261202240e40124ff SHA-1: 2a3d0dd52237f1c7cc5701b8ca0830bae044a230 SHA-256: cc982254e0231cfaa11b3488c2351e4298d22556ba2b80ad9e1f3b334d972c29
152 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and heuristics indicate it contains a malicious redirector link. The document body, though heavily obfuscated, contains text related to drawing comics and includes the malicious URL. The presence of numerous embedded links, many pointing to the same redirector service, suggests an attempt to distribute malicious content or phishing lures.

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.ru/pify?keyword=aprender+a+dibujar+comics+estilo+marvel+pdf
    • http://files.edotsdesign.com/uploads/1/3/0/8/130813887/4843517.pdf
    • http://gofuw.amochiropractic.com/uploads/1/3/0/7/130738615/duwisofafevonenoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/4506/8699/files/38165653272.pdf
    • https://cdn.shopify.com/s/files/1/0428/6421/4182/files/sims_makin_magic.pdf
    • https://cdn.shopify.com/s/files/1/0450/3640/4900/files/euploidy_and_aneuploidy.pdf
    • https://cdn.shopify.com/s/files/1/0439/1780/3675/files/some_type_of_love_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0440/6090/1528/files/mcdonalds_breakfast_coupons.pdf
    • https://cdn.shopify.com/s/files/1/0433/7162/6652/files/26593409191.pdf
    • https://cdn.shopify.com/s/files/1/0430/9096/8729/files/abbi_glines_rosemary_beach.pdf
    • https://cdn.shopify.com/s/files/1/0435/4772/1892/files/tufidifokeresar.pdf
    • https://cdn.shopify.com/s/files/1/0440/7522/1144/files/the_escapist_2008.pdf
    • https://cdn.shopify.com/s/files/1/0430/3929/3593/files/gogelimujofed.pdf
    • https://cdn.shopify.com/s/files/1/0431/9979/1265/files/apk_saint_seiya_awakening_taiwan.pdf
    • https://cdn.shopify.com/s/files/1/0439/8071/8238/files/amadeus_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/3159/2088/files/55485500410.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_off000047a9.bin
9966b70619ef987a3a0096eba1100863a1bb93911b6e800f9be2891109831046
pdf-font-stream PDF embedded font (sfnt) at offset 0x47A9 5568 bytes
font_01_sfnt_off00005a72.bin
65af00086333ca3e44efbe177ead17fb49989042ed81d11458f8930f91061254
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A72 9928 bytes