Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce878e490f69f412…

MALICIOUS

PDF

80.7 KB Created: 2020-08-19 11:29:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c61397cfde1aad84b584955143306d9 SHA-1: 458114ad599b6d2a9104ebfa37dc70166fb38cb0 SHA-256: ce878e490f69f4124233378b6bb232f16750749a5f2f44322bf3870103826a14
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains but also including a suspicious redirector URL (ttraff.ru). This indicates a link farm designed to obscure the final malicious destination. The ML classifier strongly flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which is likely used to funnel users to a phishing or scam page.

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=android+smartwatch+for+women
    • http://givodu.farmtoartfun.com/uploads/1/3/0/8/130813108/metuwewo.pdf
    • http://files.littletheorem.co.uk/uploads/1/3/2/6/132681415/2442107.pdf
    • http://files.hilgar.com/uploads/1/3/1/4/131453031/61188864e35af6.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/52841777846.pdf
    • https://cdn.shopify.com/s/files/1/0430/6396/7906/files/83691573258.pdf
    • https://cdn.shopify.com/s/files/1/0427/9359/9132/files/53558930012.pdf
    • https://cdn.shopify.com/s/files/1/0433/4750/9416/files/8_bit_adder.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5930/files/mario_bros_themes.pdf
    • https://cdn.shopify.com/s/files/1/0430/6203/4589/files/tojededajiwa.pdf
    • https://cdn.shopify.com/s/files/1/0433/1628/1512/files/vuwakanevij.pdf
    • https://cdn.shopify.com/s/files/1/0438/1881/1552/files/angular_ui_autocomplete.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4432/files/3643859645.pdf
    • https://cdn.shopify.com/s/files/1/0435/6869/3407/files/3rd_grade_math_2_step_word_problems.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e153.bin
0f0fa0f096b6c4e27cf79fa8fc4f9423d11f569a4c33aa96f49fdfd47eb5d1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE153 5308 bytes
font_01_sfnt_off0000f339.bin
113a67c841af57ed574cc30f094b4ef4e38ec5e5c1b7e8fe725d20ab3659442d
pdf-font-stream PDF embedded font (sfnt) at offset 0xF339 1700 bytes
font_02_sfnt_off0000fbb7.bin
80818298c44d2b0fbaf7cea6231a9a5e600472ad67334b7b676971686b6775bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB7 10688 bytes
font_03_sfnt_off00012040.bin
333c6b7950143ef5b768b9d621755905cb9f9f437be433e332b6baa8edb2b5fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x12040 16148 bytes