Malicious PDF — malware analysis report

Static analysis result for SHA-256 9444c1f2fb20173c…

MALICIOUS

PDF

56.8 KB Created: 2020-08-18 20:45:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 26b5015fe7743e787de5339b011f9284 SHA-1: ae2b26ca8d0dfcd6b76b064f9faeb5ff501b53ba SHA-256: 9444c1f2fb20173c215490ea6d92c8a09842d00756b067d1685bb43d3ca0b055
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a link to a known malicious redirector, ttraff.com, which is likely intended to lead the user to a phishing or malware distribution site. The document body, though heavily obfuscated, contains the URL and a keyword related to medical conditions, suggesting a lure. The presence of a PDF link farm further indicates malicious intent to distribute content or traffic.

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=cervical+thecal+sac+deformity
    • http://files.hindidox.com/uploads/1/3/1/0/131070911/7667a.pdf
    • http://files.egyptiangift179.com/uploads/1/3/0/8/130874110/kirevu_potakapa_wokozogo.pdf
    • http://files.dhi-nc.com/uploads/1/3/2/7/132712306/c2ba1c74fb2d.pdf
    • http://files.inclusionatwork.net/uploads/1/3/1/4/131453170/8145296.pdf
    • http://files.essentialsforseniors.com/uploads/1/3/1/0/131070481/zosetebibixu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0099/5741/files/ruximosekopipepitunudowot.pdf
    • https://cdn.shopify.com/s/files/1/0429/5249/1159/files/pujufifajexokizexuvekaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/9375/2997/files/62533123243.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/51674177559.pdf
    • https://cdn.shopify.com/s/files/1/0433/4652/6361/files/24166498221.pdf
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/11754692687.pdf
    • https://cdn.shopify.com/s/files/1/0430/2651/4077/files/vazozonitimojetax.pdf
    • https://cdn.shopify.com/s/files/1/0433/3672/8744/files/76104955521.pdf
    • https://cdn.shopify.com/s/files/1/0428/9763/7535/files/femaf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4628/1120/files/que_es_el_radicalismo_raul_alfonsin.pdf
    • https://cdn.shopify.com/s/files/1/0433/1533/1227/files/dukijazi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.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_off00009ff9.bin
12424f0875e5b414f9d3249468170c2b5ed0d83f5d2262dac8679f57edd5686c
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FF9 5328 bytes
font_01_sfnt_off0000b1f0.bin
a31ec5eb01c1d3b4024331084f61a0bb628d1de7d566681f3ca12a89bbb63c45
pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F0 10496 bytes