Malicious PDF — malware analysis report

Static analysis result for SHA-256 121627e5dda946d1…

MALICIOUS

PDF

58.1 KB Created: 2020-08-19 06:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90b44e62b3c4a43a3bd53f1259f50354 SHA-1: 58e9c78d782f89f87523c59b902637fc014211b6 SHA-256: 121627e5dda946d184bc4f43a241283e1792d7f5a0d5cb54f33cdca5eab0edab
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The document body, though heavily obfuscated, contains text suggesting a lure for movie downloads, which is a common tactic for SEO spam and phishing. The ML classifier also strongly indicated maliciousness.

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=evil+dead+tamil+full+movie+hd
    • http://files.mentalhealthjunkie.com/uploads/1/3/1/4/131407183/670c2.pdf
    • http://files.dengkechen.com/uploads/1/3/0/7/130775645/lejipezukofuwede.pdf
    • http://wemajex.boudoirbypamelam.com.au/uploads/1/3/2/8/132814664/gixovalobuvijax.pdf
    • http://files.devinmgill.com/uploads/1/3/1/1/131164476/rarulopiwed_wogenabotefu_dewejenif.pdf
    • http://gafebabu.mojovolleyball.com/uploads/1/3/0/7/130739430/tageduwaxib-mapili.pdf
    • http://fedorahosted.org/lohit
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/0796/5345/files/ragnarok_guild_emblem.pdf
    • https://cdn.shopify.com/s/files/1/0428/9078/9020/files/lijubanulexad.pdf
    • https://cdn.shopify.com/s/files/1/0428/7604/3423/files/gowetufiman.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/22832998604.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3713/files/49314270096.pdf
    • https://cdn.shopify.com/s/files/1/0437/2289/9608/files/past_tense_examples_sentences.pdf
    • https://cdn.shopify.com/s/files/1/0440/4396/0485/files/interoffice_memo_word_template.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/32923267679.pdf
    • https://cdn.shopify.com/s/files/1/0435/2635/7152/files/33687264488.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4704/files/24954259422.pdf
    • https://cdn.shopify.com/s/files/1/0429/3532/0742/files/sherlock_holmes_rus.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/laxujididisisovivam.pdf
    • https://cdn.shopify.com/s/files/1/0436/0860/4829/files/85630674766.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007779.bin
3c325715fadd28f366521d29b4ae0d696c77ccdf614d52361843e3fca1cb2e96		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7779 14396 bytes
font_00_sfnt_off000066f3.bin
b7b87aea35f7d9978aee44beffe8e5f61e9b2a47b0e1f57ac79c67dc9547958b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F3 4888 bytes
font_02_sfnt_off00009a6d.bin
97882b199244dc90006c5f51aa8a34412b802414cdce22183d399f7d27da463e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A6D 3064 bytes
font_03_sfnt_off0000a747.bin
0c904e32b7b00eca534c006168ed122be5fe7d31cf74a6b873e9b114377eaba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA747 11428 bytes
font_04_sfnt_off0000cd6f.bin
b488a3026bd3f6d3a1854f6a755e5d617dbba8c0fe5e8c931c8e8987c93c53a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCD6F 3112 bytes

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