Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da95c8b1a572f10…

MALICIOUS

PDF

65.2 KB Created: 2020-08-31 22:13:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 038007fd51fd569752ab55383818fc70 SHA-1: 3109541b331077174e6dd666aecb2e6407969ab1 SHA-256: 6da95c8b1a572f1068533e23c7683dde1ba1d91ae1d27ff54b9f1083e9c5f594
174 Risk Score

Malware Insights

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

The PDF contains embedded links and text that direct users to a malicious URL, disguised as an educational resource. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the malicious nature of the primary URL. The ML classifier also strongly indicates maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=kalvisolai+12th+physics+answer+key+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/10e3af_a1773b22fb0b409790882a73a42c2d74.pdf
    • https://static.usrfiles.com/ugd/b8c837_af46178635b24690bcc99f6758291b71.pdf
    • https://static.usrfiles.com/ugd/f1d680_ee669557febf416a8cb2ba98e2e64560.pdf
    • https://static.usrfiles.com/ugd/b8c837_2a5aa4b91117444d966558782b815cbe.pdf
    • https://static.usrfiles.com/ugd/50c35f_68e9104c52ea4337833954c33ddd5448.pdf
    • https://cdn.shopify.com/s/files/1/0428/5209/0022/files/8905006426.pdf
    • https://cdn.shopify.com/s/files/1/0432/6408/2073/files/56838002376.pdf
    • https://cdn.shopify.com/s/files/1/0428/2790/7239/files/lipofapefe.pdf
    • https://static.usrfiles.com/ugd/8b4172_ae99eef33b1342f9ac7b8748a08532c4.pdf
    • https://static.usrfiles.com/ugd/b972d5_a55b96a770d1483c8725041204b0d2c7.pdf
    • https://static.usrfiles.com/ugd/6a7407_22148c8097be4b2c94d99954208a9879.pdf
    • https://cdn.shopify.com/s/files/1/0434/1818/9980/files/kavuvobob.pdf
    • https://cdn.shopify.com/s/files/1/0437/5409/4753/files/89943888401.pdf
    • https://cdn.shopify.com/s/files/1/0434/0331/3315/files/vamimatafeti.pdf
    • https://cdn.shopify.com/s/files/1/0439/7708/0990/files/87238830404.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_off00008b20.bin
9755336d39238c0e2f64312b0193dc0d5e7eb33924b78bf25c5e1b3423b10b5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B20 5788 bytes
font_01_sfnt_off00009ef0.bin
37f4cbb15e46159a437da9baaa42b2b636aa3abbcfb9e7078f818e4d55dce41b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EF0 16776 bytes
font_02_sfnt_off0000c4cb.bin
df9bdb8c7f5764d5bddfc670a580eaaaa06c29e90b97e3e97df0d0ab12d207cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4CB 16440 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.