Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e27df82c191c777…

MALICIOUS

PDF

34.7 KB Created: 2020-08-20 19:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a035f7f71581f1b0ab339f3dc33ee0b SHA-1: 39465c16160adc23b463396a67abf4101bc49fe5 SHA-256: 5e27df82c191c7772e83fa260a0bb0cc5ffc787c36dbbe4d0f82b0fc88fd09a7
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, appears to be a lure for a 'Bowflex xtreme 2 owners manual'. The presence of a malicious redirector and a large number of external links suggests an attempt to drive traffic to potentially harmful sites, possibly for phishing or malware distribution.

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.cc/pify?keyword=bowflex+xtreme+2+owners+manual
    • http://lolewedob.live2servebr.org/uploads/1/3/1/8/131871825/9142653.pdf
    • http://files.loesshillsalliance.com/uploads/1/3/0/7/130740517/3134452.pdf
    • http://files.jxli.net/uploads/1/3/0/7/130775997/1522425.pdf
    • http://pamoji.indiarosekushner.com/uploads/1/3/1/3/131379179/2945721.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/89694152212.pdf
    • https://cdn.shopify.com/s/files/1/0427/8432/5798/files/93097486132.pdf
    • https://cdn.shopify.com/s/files/1/0427/6781/0726/files/mofagemovipoxorurawe.pdf
    • https://cdn.shopify.com/s/files/1/0436/1915/6130/files/10860507039.pdf
    • https://cdn.shopify.com/s/files/1/0431/5919/1712/files/68754353883.pdf
    • https://cdn.shopify.com/s/files/1/0429/6923/5619/files/cpec_and_gilgit_baltistan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/46552055365.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/60207902110.pdf
    • https://cdn.shopify.com/s/files/1/0450/1274/6390/files/variable_frequency_drive_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0433/3728/5797/files/vejajenoputasobora.pdf
    • https://cdn.shopify.com/s/files/1/0428/6283/7919/files/buvexutixitoluruzoruva.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000048b8.bin
7004f0417696b8cac1bc5870a22a1e38fab482f1a3546afbcaa517bd70630d0d
pdf-font-stream PDF embedded font (sfnt) at offset 0x48B8 5252 bytes
font_01_sfnt_off00005a93.bin
0dd25b8f26bcc696a21b5093eac8367e99848ee6a3ce6805cb21bd1ae3c6859a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A93 10348 bytes