Malicious PDF — malware analysis report

Static analysis result for SHA-256 03cd9bc8f59479ae…

MALICIOUS

PDF

53.5 KB Created: 2020-08-09 17:02:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7a4ee7bdae3d50d7bf16ca254c8f06a SHA-1: 290ac12d6f96382100f72071d3bf6885b73c65f7 SHA-256: 03cd9bc8f59479ae89bb3fc2bd1383f98716117da36a72757091f024d44cb8a2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, including a known malicious redirector at ttraff.com. The document body, though obfuscated, contains text suggesting it is disguised as academic notes to entice clicks. The ML classifier strongly indicated maliciousness, and the presence of a malicious redirector points to a phishing or scam attempt.

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=acca+p4+lsbf+class+notes+pdf
    • http://files.authenticstonecreations.com/uploads/1/3/2/7/132740606/kimamexomujonosoxu.pdf
    • http://files.parklandpickleheads.com/uploads/1/3/1/4/131437655/ridapu.pdf
    • http://files.hostessjobitaly.com/uploads/1/3/1/4/131453595/e12801f6c5b.pdf
    • http://files.sanctuaries.org/uploads/1/3/1/8/131856443/jebegesogitesol.pdf
    • http://files.nalcoxford.com/uploads/1/3/1/3/131384429/dufowi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/73370609066.pdf
    • https://cdn.shopify.com/s/files/1/0436/4923/7145/files/35856686459.pdf
    • https://cdn.shopify.com/s/files/1/0432/0994/9348/files/biology_notes_gradeup.pdf
    • https://cdn.shopify.com/s/files/1/0431/8583/2096/files/41025101675.pdf
    • https://cdn.shopify.com/s/files/1/0434/8936/2082/files/cost_accounting_horngren_15th.pdf
    • https://cdn.shopify.com/s/files/1/0439/1829/5195/files/gededixigikezuxemob.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/41843995834.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/league_of_legends_rengar_build.pdf
    • https://cdn.shopify.com/s/files/1/0431/6879/2733/files/conduite_a_tenir_devant_un_arret_cardiaque.pdf
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/xanakanisofebinus.pdf
    • https://cdn.shopify.com/s/files/1/0436/1040/7069/files/48662082224.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0701/files/bopawofitidofosexizuli.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_off00008418.bin
54910db32a100ffa44e3391f6b8b6cd11b971d8da72ce195694d53da0f09e3c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 3944 bytes
font_01_sfnt_off00009221.bin
ef97fbbeac6b360c648f87b4bf7e1eefb4513f8d1621a8de2b8ef61804e40d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9221 5268 bytes
font_02_sfnt_off0000a426.bin
21ef887faf43a3fdcb8a4037513906cecc20e6530c4850c8ae44974ecc1a214b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA426 10000 bytes

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