Malicious PDF — malware analysis report

Static analysis result for SHA-256 850598ae4f33395a…

MALICIOUS

PDF

41.8 KB Created: 2020-08-03 06:56:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5881150218e78d0765ee78d1b64f470d SHA-1: 63d959e49d7e251115c053a0f56194c722a428ba SHA-256: 850598ae4f33395a618770c4c9c6359e8009f037097b26285df027cfb83538b8
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The presence of numerous external PDF links further indicates a link farm or spamming operation.

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.cc/pify?keyword=good+vibration+lyrics
    • http://files.sfagingresearch.com/uploads/1/3/2/3/132302732/2d38ee490b2809.pdf
    • http://files.sharibatheactor.com/uploads/1/3/2/6/132681579/mikuvusutovavi.pdf
    • http://files.playguitarsolos.com/uploads/1/3/0/7/130776111/bawisilubel-nupogepozife-nugozuminari.pdf
    • http://files.gypsychicks.ca/uploads/1/3/2/7/132710763/dozozuxoji_wenumu_dajesezili.pdf
    • http://files.rocketbetty.com/uploads/1/3/0/7/130739596/jofosotipogasukobu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/38267891522.pdf
    • https://cdn.shopify.com/s/files/1/0435/7252/7267/files/sabotoluda.pdf
    • https://cdn.shopify.com/s/files/1/0437/5520/8865/files/5551660682.pdf
    • https://cdn.shopify.com/s/files/1/0434/0350/9914/files/puzulidakew.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/vexefinuvupuwili.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6828/files/jekojazevabuvim.pdf
    • https://cdn.shopify.com/s/files/1/0433/3414/0056/files/76077107679.pdf
    • https://cdn.shopify.com/s/files/1/0437/6189/3534/files/binujolitafomilajunite.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/vumivafumotodilajaguzof.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005519.bin
1f346b0acb0d6471349f5606f1fc7ba7bdbc4ea5c72453f896ad63baa78dd539
pdf-font-stream PDF embedded font (sfnt) at offset 0x5519 4936 bytes
font_01_sfnt_off000065f2.bin
4a0ae4688d59d3e75949fce2e3d11efcf0c17d031463528a3806d8a35c71ad10
pdf-font-stream PDF embedded font (sfnt) at offset 0x65F2 12140 bytes
font_02_sfnt_off00008c74.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x8C74 4324 bytes