Malicious PDF — malware analysis report

Static analysis result for SHA-256 2daf2e326533315f…

MALICIOUS

PDF

38.4 KB Created: 2020-08-06 14:18:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 367b40c94008cba52c5af8bdcd3f3555 SHA-1: ab21906b567e82b52e79b3de1bff4bc3a9c9d823 SHA-256: 2daf2e326533315f57c7f17803d74f8bd1cbfe8faaf3668950ad0fec165d06a4
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.com/pify?keyword=acer+aspire+one+zg5+manual+pdf'. This indicates a phishing or scam attempt, likely to redirect the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains text related to the Acer Aspire One manual and the malicious URL, reinforcing the lure.

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=acer+aspire+one+zg5+manual+pdf
    • http://tefitane.swannanoavet.com/uploads/1/3/1/3/131383544/vadewofedebalev-ludijefujejiwok.pdf
    • http://files.schombergcommunityfarm.ca/uploads/1/3/1/3/131380868/c3c31a37f78ec7.pdf
    • http://files.talking4health.org/uploads/1/3/2/6/132681877/8b1d1c7fb3bd25.pdf
    • http://files.vrm365.com/uploads/1/3/1/3/131398197/6f7e5.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/dogideketonos.pdf
    • https://cdn.shopify.com/s/files/1/0437/6163/1389/files/93293717224.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/rikododovefipikalubovor.pdf
    • https://cdn.shopify.com/s/files/1/0431/5820/8674/files/kutaluwegesizokuvowure.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/gudemodukeralo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1313/5774/files/55425897527.pdf
    • https://cdn.shopify.com/s/files/1/0435/5365/2895/files/toro_kohler_6._75_149cc_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5816/6941/files/chicken_soup_for_the_soul.pdf
    • https://cdn.shopify.com/s/files/1/0431/0827/0244/files/rogekinokaxedatigi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/89363325815.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a8a.bin
039dd15ebae5ef6b86f5c113008dba562549a1afeece134d62cfaddc27450588
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A8A 5440 bytes
font_01_sfnt_off00005cef.bin
5b8c02dad2c41aee43bd1e6e167f00e14503dc97a2870766aa63158100b52451
pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEF 9788 bytes
font_02_sfnt_off00007e91.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x7E91 4324 bytes