Malicious PDF — malware analysis report

Static analysis result for SHA-256 74e983300ad25ae6…

MALICIOUS

PDF

36.1 KB Created: 2020-08-04 17:52:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c99088fcd4d97a592988a4bb87b724b SHA-1: e4e3e8e56c4ab8e4d9cdf4f413c26e15baa227c5 SHA-256: 74e983300ad25ae6b2d00f5a69129a27903a5e0f04a87854581085c5e4724444
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for users to click on the embedded links, which likely lead to further malicious content or phishing pages.

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.ru/pify?keyword=c+est+moi+camelot+pdf
    • http://files.lisaellisonart.com/uploads/1/3/1/6/131637226/pogulodexomug.pdf
    • http://files.niavanabelgians.com/uploads/1/3/1/4/131436991/b360c5ff.pdf
    • http://files.stockbridgerobotics.com/uploads/1/3/1/1/131163736/ziwirarotekes_junapenowokumo_begomobevexaw.pdf
    • http://files.statebirdtogo.com/uploads/1/3/1/4/131408620/fovajobupuvudipetuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/98387322603.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/fangirl_rainbow_rowell_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/21533622499.pdf
    • https://cdn.shopify.com/s/files/1/0431/2717/7380/files/kejisusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/5750/4668/files/kazigukufugabalapiriv.pdf
    • https://cdn.shopify.com/s/files/1/0439/8769/7822/files/wetoji.pdf
    • https://cdn.shopify.com/s/files/1/0431/4418/3970/files/52656262314.pdf
    • https://cdn.shopify.com/s/files/1/0436/0237/8915/files/jipujivevipaxaleb.pdf
    • https://cdn.shopify.com/s/files/1/0435/9471/1203/files/nuwave_pro_plus_infrared_oven.pdf
    • https://cdn.shopify.com/s/files/1/0427/9340/2524/files/nofedagepagapovori.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6729/files/51814855188.pdf
    • https://cdn.shopify.com/s/files/1/0434/0665/5642/files/wuzopelokifus.pdf
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/kesirujojedigugajiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4032/6300/files/pilogesavesidoseg.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_off00004dcf.bin
c97f2d16486e861602893c3b9f0e601faba91b4820d6ca74d2ded33588b02b0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4DCF 5108 bytes
font_01_sfnt_off00005f1d.bin
df1fa4949133f63113ea10ff233ee37ae462fb7c9aed718f94cf79c667bd100e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F1D 11080 bytes

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