Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c501e6ef0aac10…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 06:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a59e7e7c2155ef002435aa97f54fdcb0 SHA-1: d642216e25a884c5c2fc8e1e841409e54b4adf16 SHA-256: f1c501e6ef0aac10b72ba873585eec776956bb284e3e9127611551d13972021f
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'https://ttraff.com/pify?keyword=game+offline+android'. The document body, though heavily obfuscated, contains text related to 'Game offline android' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness.

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=game+offline+android
    • http://files.biosciencelabs.co.uk/uploads/1/3/1/4/131483719/720fab99aa8.pdf
    • http://files.acrosstheinfinitevoid.com/uploads/1/3/1/6/131637016/falezazepiv.pdf
    • http://xunab.teaandtango.com/uploads/1/3/2/7/132740214/xozezubopezobej.pdf
    • http://paduji.tgcvdc.org/uploads/1/3/1/8/131871721/4232038.pdf
    • http://josazi.dedicatedrv.com/uploads/1/3/2/6/132695742/fuxatapotibota_kodewuj_pubivile_barubowigetem.pdf
    • https://cdn.shopify.com/s/files/1/0464/1429/9304/files/hostiles_movie_parents_guide.pdf
    • https://cdn.shopify.com/s/files/1/0451/3693/7125/files/linked_list_in_python.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9335/files/dipodevusewug.pdf
    • https://cdn.shopify.com/s/files/1/0434/1586/3447/files/wirezesavir.pdf
    • https://cdn.shopify.com/s/files/1/0433/1828/0357/files/xupiwimirifufanupim.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7946/files/java_6_64_bit.pdf
    • https://cdn.shopify.com/s/files/1/0430/4856/6933/files/the_lottery_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/6895/6565/files/bemuwatikifagajubular.pdf
    • https://cdn.shopify.com/s/files/1/0448/0358/8258/files/facebook_page_size_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/0067/6001/files/87055383686.pdf
    • https://cdn.shopify.com/s/files/1/0429/4872/2851/files/xufazov.pdf
    • https://cdn.shopify.com/s/files/1/0433/4741/1096/files/31268619777.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_off00006221.bin
10e8104b176dfbf20951ae50cc3ea025ef82d31471a7bca8911a6a9f4d74e4f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6221 4908 bytes
font_01_sfnt_off000072c1.bin
ab48a315577755539cbc4699b9e3550406fa144dd3084665f1abb7fc08d44ebd
pdf-font-stream PDF embedded font (sfnt) at offset 0x72C1 10000 bytes