Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5e7cb9525b360c…

MALICIOUS

PDF

46.0 KB Created: 2020-08-02 12:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 194dd356e8c8df32e1d0cf2b20328648 SHA-1: ba8296d90fdae63edf8437614079d9a632e7dfdc SHA-256: 7e5e7cb9525b360c4d9a435e86f180c1d0def23e9356e5681553a806e8656854
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of the primary links redirects through a known malicious redirector, ttraff.cc. The document body, though heavily obfuscated, contains the same redirector URL, suggesting an attempt to lure users to malicious content. 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.cc/pify?keyword=super+pose+book+pdf
    • http://files.oceansedgeediting.com/uploads/1/3/2/7/132712415/8ad983.pdf
    • http://files.wearemne.com/uploads/1/3/2/3/132302896/dafilogogezibarefen.pdf
    • http://files.friendswoodtennis.com/uploads/1/3/1/1/131164475/xinunu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/658286607.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5694/files/tribal_totem_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0435/7285/4939/files/funny_university_names.pdf
    • https://cdn.shopify.com/s/files/1/0435/8920/6174/files/lupekanekafezetexixes.pdf
    • https://cdn.shopify.com/s/files/1/0438/3876/7266/files/2577219952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/salelixakibikiziz.pdf
    • https://cdn.shopify.com/s/files/1/0443/8127/4278/files/lcs_academy_standings.pdf
    • https://cdn.shopify.com/s/files/1/0434/9755/4084/files/fenuvoxetorawiga.pdf
    • https://cdn.shopify.com/s/files/1/0436/5074/4478/files/gikowenu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8795/3053/files/77467994293.pdf
    • https://cdn.shopify.com/s/files/1/0433/7369/1045/files/66103643308.pdf
    • https://cdn.shopify.com/s/files/1/0429/2021/4681/files/gomodinukamodigelorowura.pdf
    • https://cdn.shopify.com/s/files/1/0437/8643/6759/files/82950669934.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000491e.bin
cb80f2463c2465d39ea68a3ddc8e2e5622ddace0a5db69229848292c8f3d6454		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x491E 9776 bytes
font_01_sfnt_off00006957.bin
9d219ad4a4865cf0c7c649cc4a7e26dacf12c2f8b2a5ec8ef535577a45060f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6957 4748 bytes
font_02_sfnt_off0000797a.bin
ec9a4cb50479ddd63d1c0c589aa50e102c2b9c3e4d3f6120475395d96fbed186		 pdf-font-stream PDF embedded font (sfnt) at offset 0x797A 9992 bytes
font_03_sfnt_off00009b2d.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2D 4324 bytes

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