Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1bb7da47bc95a31…

MALICIOUS

PDF

48.1 KB Created: 2020-08-11 01:53:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcd44b77c3fb22f08b01a9f131e04881 SHA-1: ebb05b7ac36700f9d1668a66888f264f056af921 SHA-256: a1bb7da47bc95a311b2b191aa68a502e96cfd8710beaecda86447a00eb4eab5c
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, includes the text 'Annemarie schimmel islam an introduction pdf' and a URL that appears to be part of a link farm designed to attract search engine traffic. The presence of a malicious redirector link strongly suggests an intent to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=annemarie+schimmel+islam+an+introduction+pdf
    • http://vagevit.kerrysmiller.com/uploads/1/3/1/0/131069899/9fb0d35.pdf
    • http://files.haldisindoor.com/uploads/1/3/1/4/131482886/gunaxaludova.pdf
    • http://files.rosysomerville.com/uploads/1/3/1/0/131070011/kifomod_zofenurojebomiv.pdf
    • http://lurevu.fhbcofhartsville.org/uploads/1/3/2/8/132814930/85d647.pdf
    • https://cdn.shopify.com/s/files/1/0433/8686/3783/files/81459692014.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/medade.pdf
    • https://cdn.shopify.com/s/files/1/0429/0838/5439/files/wiledosisujug.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4827/files/decimal_to_binary_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0432/4691/1643/files/python_unit_testing.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/bejodarebopap.pdf
    • https://cdn.shopify.com/s/files/1/0430/4555/2290/files/dudinujiwazupufezaribax.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sezam.pdf
    • https://cdn.shopify.com/s/files/1/0428/4992/7327/files/bbc_english_grammar_book.pdf
    • https://cdn.shopify.com/s/files/1/0432/2213/9041/files/tokokexu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/libopu.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7545/files/vidowodozelejefemen.pdf
    • https://cdn.shopify.com/s/files/1/0434/4568/2328/files/72278360482.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
stream_005_off00008a19.bin
e32cd13788d52bd7700cb02ea543de00c9681294dc8124abcd1e503c5e1faab4
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x8A19 22812 bytes
font_00_sfnt_off000055cf.bin
f32670eac176fa8cb594828beb1dc240bb7e1ac144e54d14c5fd81510368194c
pdf-font-stream PDF embedded font (sfnt) at offset 0x55CF 5384 bytes
font_01_sfnt_off000067e2.bin
b607a4d8f605822ff690316e6ef9a74a5b760fbf30119ad1af9ca8b479415d90
pdf-font-stream PDF embedded font (sfnt) at offset 0x67E2 9964 bytes