Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5c74419e64832b3…

MALICIOUS

PDF

44.8 KB Created: 2020-08-09 20:39:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11f7a8f02da8c4bd4906d372f7db087d SHA-1: ce3b8e6c6a83b35f72640cdbe8e4ce1ca9d7172d SHA-256: b5c74419e64832b3c3d6100b52c7a484789e89733bb73d3531c782a7081795c0
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing for a malicious redirector link. The document body, though heavily obfuscated, contains a URL that points to a redirector. This indicates the primary purpose is to lure users to click on malicious links, likely for phishing or to download further malware. No scripts were extracted from this sample.

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.com/pify?keyword=alter+ego+a1+french+book+pdf
    • http://nepuwaka.metzteaching.org/uploads/1/3/2/6/132682883/9a989731f8b.pdf
    • http://files.mail.byboukje.nl/uploads/1/3/0/7/130775677/f2e343fd04b4.pdf
    • http://vekaget.spaldingschoolofscience.com/uploads/1/3/2/3/132303189/japotix.pdf
    • http://farijed.equineflow.com/uploads/1/3/0/9/130969723/govelisobom_bikafewo_xagafewemi.pdf
    • http://neginu.thebearstfriendsfurevershow.com/uploads/1/3/1/8/131871674/c420db85a.pdf
    • https://cdn.shopify.com/s/files/1/0430/5698/8311/files/sapiseku.pdf
    • https://cdn.shopify.com/s/files/1/0431/5496/4629/files/75026410206.pdf
    • https://cdn.shopify.com/s/files/1/0427/9821/9420/files/88106727778.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/negipopuw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3814/4672/files/200_pound_beauty_full_movie.pdf
    • https://cdn.shopify.com/s/files/1/0433/2643/9582/files/dusipajagebofuvofor.pdf
    • https://cdn.shopify.com/s/files/1/0437/0890/7688/files/bafinizilezotara.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/rimudunibodosugesujusuvud.pdf
    • https://cdn.shopify.com/s/files/1/0428/3308/4575/files/dozalu.pdf
    • https://cdn.shopify.com/s/files/1/0429/9302/5183/files/input_lag_demo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7562/4350/files/47718312644.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007c34.bin
7804b7ec009b854645da235feb62eeb617ecefe1890d60e9917864f92ed45355		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7C34 23612 bytes
font_00_sfnt_off00004ba7.bin
c35b759046c30172cf12d1665aaa74ad969806165ed5d2178bbdff89b9c40072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA7 5484 bytes
font_01_sfnt_off00005e4a.bin
f05a054aa579c90ae6767ffc463018a19c607841bac83f03903ea93080c4e171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4A 8732 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.